// 实现语音识别子服务
#include <brpc/server.h>
#include <butil/logging.h>
#include "asr.hpp"      // 语音识别封装
#include "etcd.hpp"     // 服务注册封装
#include "logger.hpp"   // 日志模块封装
#include "speech.pb.h"  // protobuf框架代码

namespace suye
{
class SpeechServiceImpl : public suye::SpeechService {
public:
    SpeechServiceImpl(const ASRClient::ptr& asr_client)
        : _asr_client(asr_client) {}
    ~SpeechServiceImpl() {}
    
    void SpeechRecognition(google::protobuf::RpcController* controller,
        const ::suye::SpeechRecognitionReq* request,
        ::suye::SpeechRecognitionRsp* response,
        ::google::protobuf::Closure* done)
    {
        LOG_DEBUG("收到语音转文字请求！");
        brpc::ClosureGuard rpc_guard(done);  
        // 1.取出请求中的语音数据
        // 2.调用语音sdk模块进行语音识别，得到响应
        std::string err;
        std::string res = _asr_client->recognize(request->speech_content(), err);
        if(res.empty()) {
            LOG_ERROR("{}语音识别失败！", request->request_id());
            response->set_request_id(request->request_id());
            response->set_success(false);
            response->set_errmsg("语音识别失败：" + err);
            return;
        }
        // 3.组织响应
        response->set_request_id(request->request_id());
        response->set_success(true);
        response->set_recognition_result(res);
    }
private:
    ASRClient::ptr _asr_client;
};

class SpeechServer {
public:
    using ptr = std::shared_ptr<SpeechServer>;
    SpeechServer(const ASRClient::ptr& asr_client,
        const Registry::ptr& reg_client,
        std::shared_ptr<brpc::Server>& rpc_server) 
        : _asr_client(asr_client),
        _reg_client(reg_client),
        _rpc_server(rpc_server) {}
    ~SpeechServer() {}
    
    // 搭建RPC服务器，并启动服务器
    void start()
    {
        _rpc_server->RunUntilAskedToQuit();
    }

private:
    ASRClient::ptr _asr_client;
    Registry::ptr _reg_client;
    std::shared_ptr<brpc::Server> _rpc_server;
};

class SpeechServerBuilder {
public:
    // 构造语音识别客户端对象
    void make_asr_object(const std::string& app_id,
                const std::string& api_key,
                const std::string& secret_key)
    {
        _asr_client = std::make_shared<ASRClient>(app_id, api_key, secret_key);
    }

    // 构造服务注册客户端对象
    void make_reg_object(const std::string& reg_host, 
                const std::string& service_name,
                const std::string& access_host)
    {
        _reg_client = std::make_shared<Registry>(reg_host);
        _reg_client->registry(service_name, access_host);
    }

    // 构造RPC服务器对象
    void make_rpc_server(uint16_t port, int32_t timeout, uint8_t num_threads)
    {
        _rpc_server = std::make_shared<brpc::Server>();
        SpeechServiceImpl* speech_service = new SpeechServiceImpl(_asr_client);
        int ret = _rpc_server->AddService(speech_service, brpc::ServiceOwnership::SERVER_OWNS_SERVICE);    
        if (ret == -1) {
            LOG_ERROR("添加RPC服务失败");
            abort();
        }

        brpc::ServerOptions options;
        options.idle_timeout_sec = timeout;  
        options.num_threads = num_threads;     
        ret = _rpc_server->Start(port, &options);  
        if (ret == -1) {
            LOG_ERROR("服务启动失败！");
            abort();
        }   
    }

    SpeechServer::ptr build()
    {
        if (!_asr_client) {
            LOG_ERROR("还未初始化语音识别模块！");
            abort();
        } 
        if (!_reg_client) {
            LOG_ERROR("还未初始化服务注册模块！");
            abort();
        }
        if (!_rpc_server) {
            LOG_ERROR("还未初始化RPC服务器模块！");
            abort();
        }
        SpeechServer::ptr server = std::make_shared<SpeechServer>(_asr_client, _reg_client, _rpc_server);
        return server;
    }
private:
    ASRClient::ptr _asr_client;
    Registry::ptr _reg_client;
    std::shared_ptr<brpc::Server> _rpc_server;
};
}